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From: dlou@dino.ucsd.edu (Dennis Lou)
Newsgroups: comp.graphics,comp.sys.mac.misc,comp.sys.ibm.pc
Subject: gamma correction
Message-ID: <12420@sdcc6.ucsd.edu>
Date: 26 Aug 90 07:56:59 GMT
Sender: news@sdcc6.ucsd.edu
Followup-To: comp.graphics
Organization: CSE Dept., U. C. San Diego
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I recently read an old Macworld article on scanners.  Where I work, we
have a scanner with rather limited software with it.  In this article,
however, I read about contrast enhancement using something called
Gamma Correction.  I'd like to try it for the Sunraster and TIFF files
we have at work.  I know the basic principle of remapping the
intensities, but I don't know how to compute the curve.

What I'd like to know is what's the formula for Gamma Correction?
Does anyone have any info they can tell me about it?  THanks in
advance.

Please E=mail responses please!


--
Dennis Lou                Disclaimer: I don't use lame disks.
dlou@dino.ucsd.edu         "But Yossarian, what if everyone thought that way?"
[backbone]!ucsd!dino!dlou  "Then I'd be crazy to think any other way!"